Listed below is the vehicle specific wiring diagram for your car alarm, remote starter or keyless entry installation into your 1998-1999 Gmc Suburban . This information outlines the wires location, color and polarity to help you identify the proper connection spots in the vehicle. Please be sure to test all of your wires with a digital multimeter before making any connections. More information on using a multimeter and testing wires please see our Technical Support Area.

PART

COLOR

LOCATION

12 VOLT
CONSTANT

RED (+)

@ IGNITION SWITCH HARNESS

STARTER

YELLOW (+) or PURPLE (+)

@ IGNITION SWITCH HARNESS

STARTER
2

N/A

IGNITION
1

PINK (+)

@ IGNITION SWITCH HARNESS

IGNITION
2

WHITE (+), See NOTE #5

@ IGNITION SWITCH HARNESS

IGNITION
3

N/A

ACCESSORY/HEATER
BLOWER 1

ORANGE (+)

@ IGNITION SWITCH HARNESS

ACCESSORY/HEATER
BLOWER 2

N/A

KEYSENSE

N/A

PARKING
LIGHTS ( - )

N/A

PARKING
LIGHTS ( + )

BROWN (+)

@ HEADLIGHT SWITCH or in DRIVERS KICK PANEL

POWER LOCK

LIGHT BLUE (TYPE A)

IN EITHER DOOR BOOT

POWER UNLOCK

WHITE (TYPE A)

IN EITHER DOOR BOOT

DOOR TRIGGER

PURPLE (-)

@ HEADLIGHT SWITCH

DOMELIGHT
SUPERVISION

WHITE (-) (Requires Part #775 Relay)

@ UNDERDASH LIGHT

TRUNK RELEASE

BLACK or BLACK/WHITE, See NOTE #2, (Requires Part #775 Relay)

LOW IN DRIVERS KICK PANEL

SLIDING
POWER DOOR

N/A

HORN

BLACK (-)

@ STEERING COLUMN HARNESS

TACH

WHITE (AC)

@ ECM, See NOTE #3

WAIT TO
START LIGHT

DARK BLUE (-), See NOTE #4

@ INSTRUMENT CLUSTER

BRAKE

WHITE (+)

@ SWITCH ABOVE BRAKE PEDAL

FACTORY
ALARM DISARM

N/A

ANTI-THEFT

YELLOW (+), ORANGE/BLACK (-) and RED/WHITE (Not used)

GM's PASSLOCK 2 System, these wires exit the Ignition Switch Tumbler together and are in the Main Ignition Switch Harness in the Column.

EXTRA
INFORMATION

NOTE #1: This vehicle uses GM'S PASSLOCK 2 ANTI-THEFT SYSTEM that requires a 791 Bypass
Module to Remote Start,
to order go to the SECURITY BYPASS MODULES Page on this website.
NOTE #2: on vehicles with REAR LIFT WINDOWS it is a (+) Positve system, on vehicles with
the CARGO DOORS it is a 5-Wire System See DIAGRAM
NOTE #3: the ECM (Electronic Control Module) is located on the DRIVERS SIDE INNER FENDER,
the TACH wire is in a BLACK Plug marked WHITE.
NOTE #4: when hooking up a remote starter, if you cannot get the (+) or (-) Wait to Start wire
on the Remote Starter to work properly, you will then need to disconnect this wire
and Program the Remote Starter for the 5, 10, 15 or 20 Second Wait to Start
Timmer in the Installation manual.
NOTE #5: IMPORTANT !!!!! this wire MUST BE CONNECTED as IGNITION #2 for
REMOTE STARTING!!!!!!